Folding step



FIG. 1 is a perspective view of a folding step showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof, it being understood that the left side view is a mirror image reversal of the right side view;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a right side view with the step in its retracted position. 

I claim the ornamental design for a folding step, as shown and described. 